問題詳情
一、定翼機的下洗流（downwash flow）是如何產生的？其與升力有何關係？下洗流會引起何種負面作用？（20 分）
參考答案
答案：D
難度：適中0.522727
統計：A(11),B(27),C(25),D(92),E(0)
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